1266626438 has 16 divisors (see below), whose sum is σ = 2368756224. Its totient is φ = 493490760.

The previous prime is 1266626423. The next prime is 1266626461. The reversal of 1266626438 is 8346266621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4112270 + ... + 4112577.

It is an arithmetic number, because the mean of its divisors is an integer number (148047264).

Almost surely, 2^1266626438 is an apocalyptic number.

1266626438 is a deficient number, since it is larger than the sum of its proper divisors (1102129786).

1266626438 is a wasteful number, since it uses less digits than its factorization.

1266626438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8224867.

The product of its digits is 497664, while the sum is 44.

The square root of 1266626438 is about 35589.6956716407. The cubic root of 1266626438 is about 1081.9724009893.

The spelling of 1266626438 in words is "one billion, two hundred sixty-six million, six hundred twenty-six thousand, four hundred thirty-eight".